text: (function($) {
  	$.fn.countdown = function(options, callback) {
  
  		//custom 'this' selector
  		thisEl = $(this);
  
  		//array of custom settings
  		var settings = { 
  			'date': null,
  			'format': null
  		};
  
  		//append the settings array to options
  		if(options) {
  			$.extend(settings, options);
  		}
  		
  		//main countdown function
  		function countdown_proc() {
  			
  			eventDate = Date.parse(settings['date']) / 1000;
  			currentDate = Math.floor($.now() / 1000);
  			
  			if(eventDate <= currentDate) {
  				callback.call(this);
  				clearInterval(interval);
  			}
  			
  			seconds = eventDate - currentDate;
  			
  			days = Math.floor(seconds / (60 * 60 * 24)); //calculate the number of days
  			seconds -= days * 60 * 60 * 24; //update the seconds variable with no. of days removed
  			
  			hours = Math.floor(seconds / (60 * 60));
  			seconds -= hours * 60 * 60; //update the seconds variable with no. of hours removed
  			
  			minutes = Math.floor(seconds / 60);
  			seconds -= minutes * 60; //update the seconds variable with no. of minutes removed
  			
  			//conditional Ss
  			if (days == 1) { thisEl.find(".timeRefDays").text("day"); } else { thisEl.find(".timeRefDays").text("days"); }
  			if (hours == 1) { thisEl.find(".timeRefHours").text("hour"); } else { thisEl.find(".timeRefHours").text("hours"); }
  			if (minutes == 1) { thisEl.find(".timeRefMinutes").text("minute"); } else { thisEl.find(".timeRefMinutes").text("minutes"); }
  			if (seconds == 1) { thisEl.find(".timeRefSeconds").text("second"); } else { thisEl.find(".timeRefSeconds").text("seconds"); }
  			
  			//logic for the two_digits ON setting
  			if(settings['format'] == "on") {
  				days = (String(days).length >= 2) ? days : "0" + days;
  				hours = (String(hours).length >= 2) ? hours : "0" + hours;
  				minutes = (String(minutes).length >= 2) ? minutes : "0" + minutes;
  				seconds = (String(seconds).length >= 2) ? seconds : "0" + seconds;
  			}
  			
  			//update the countdown's html values.
  			if(!isNaN(eventDate)) {
  				thisEl.find(".days").text(days);
  				thisEl.find(".hours").text(hours);
  				thisEl.find(".minutes").text(minutes);
  				thisEl.find(".seconds").text(seconds);
  			} else { 
  				alert("Invalid date. Here's an example: 12 Tuesday 2018 17:30:00");
  				clearInterval(interval); 
  			}
  		}
  		
  		//run the function
  		countdown_proc();
  		
  		//loop the function
  		interval = setInterval(countdown_proc, 1000);
  		
  	}
  }) (jQuery);